William b



(No Model.)

W. B. GOWAN. TRITURATING AND EMULSIFYING MACHINE. No. 545,456.

Patented Sept. 3, 1895.

UNITED STATES PATENT OFFICE;

WILLIAM B. OOWAN, OF GUELPH, CANADA.

TRITURATING AND EMULSIFYING MACHINE.

EvPECIFIOATION forming part of Letters Patent No. 545,456, dated September 3, 1895.

Application filed May 9,1894. Serial No. 510,585. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM B. COWAN, physician, a subject of Her Majesty Queen Victoria, residing at Guelph, in the county of Wellington, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Triturating and Emulsifying Machines, of which the following is a specification.

My invention relates to improvements in the triturating and emulsifying machine for which I obtained a patent in the United States, dated the 2d day of January, A. D. 1894, and numbered 511,755, and has for its object the automatic regulation of the grindingstones so as to enable one set to fit any sized pan, and also by means of a spring holdbackhinge joint to enable the fork-holder to be thrown back out of the way when notin use.

' Figure l is a perspective view of the old grinding-stones and regulating-fork. Fig. 2 is a similar view of the new grinding-stones and fork. Fig. 3 is a plan-of the old grindingstones and fork. Fig. 4 is a similar View of the new stones with fork and holder. Fig. 5 shows the old method of securing the fork-carrier to the fixed post outside the revolving pan. Fig. 6 shows the new spring-hinge joint by which the fork-holder swings on the fixed post.

In my first machine the vbutt-ends of my grinding-stones were out OK on a flat vertical bevel, so that they would fit together as one S-shaped stone, Fig.1, and any regulation had to be done by the stemsof the fork-tangs on which they swung, being slid in or out of hori: zontal holes bored in the lower end of the fork-carrier, and which, by moving the stones in or out from the center, increased or reduced the diameter of the circle they described, and after being adjusted to fit the when the holder is placed on it. The fork socket or hole is placed vertically in the middle of the thick butt or base of the grinding stones B and C and the butt rounded vertically into a true half-circle round the sockethole, into which the fork-tang projects, thus forming a pivot round which the stone easily swings.

When the machine is in operation, the friction of the pan and the pressure of the material being operated upon throw the points of the grinding-stones out till they touch the sides of the revolving pan A, against which they slide during the operation, their rounded bases being free to swing round the forktangs as centers without interfering and yet practically close together.

The fork-carrier J was attached to the fixed post L by means of a slot and thumb-screw, Figs. 3 and 5, and had to be removed bodily whenever the pan had to be filled, fixed, or emptied. I now obviate this by using a plain fork J with two tangs, the upward stem 1 of which is formed square at the top. Aforkholder K is hinged to the fixed post L, Fig. 6, and provided with a holdback-spring m of any suitable form, which will hold it either down to its work or up out of the waywhile the pan is being fixed, as may be required. A square hole at the other end fits down over the fork-stem 71, thus holding it firm in place and preventing any rotation of the stones when the machine is in operation.

What I claim is the improvement in triturating and emulsifying machines, consisting of 1. The grinding stones B and Owith baseor butt rounded in a semi-cylindrical form about a vertical axis formed by the fork tangs which project into them, thus forming a pivot upon which they swing till their points touch the edge of the revolving pan, actuated automatically by the friction of the revolving pan and the pressure of the material being operatedupon in connection with'a revolving pan and means for operating the same substantially as hereinbefore described and illustrated in the drawings.

2. The fork J (upon which the grinding stones swing) with upright stem (1') square at the top and the fork, holder K fitting on to and holding it firm in position; said. fork pan and means for operating the same ashereholder being attached at its other end to the inbefore described andiiiustratedinthe drawfixed post L by means of a hinge controlled ingst by a spring or springs of any suitable form, 'W. B COVAN. 5 for the purpose of holding the fork holder W'itnessesfi either down on the fork stem or up out of the W. WV. SPRAGGE,

Way, the whole in connection with a revolving J. O. IRELAND. 

